Coolant thermostat removal and installation procedure for Smart Fortwo 454.0 engine 134.9, 135.9 with exploded views and workshop photos.

Service manual page showing coolant thermostat components, engine diagram, and installation steps with numbered callouts.

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See all Powertrain figures for the Fortwo / Forfour (453), or browse the full figure library. Part numbers and callouts are community-sourced and cross-referenced against the manuals — confirm with your VIN before ordering.